SEAGATE TECHNOLOGY, INC.
Technical Support Bulletin Board
408/438-8771  [up to 9600, N-8-1]
(C)opyright  1990

                              ST - 225R

       UNFORMATTED CAPACITY (MB) ________________25.0
       FORMATTED CAPACITY (31 SECTORS) (MB) _____21.2
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________1,334
       CYLINDERS ________________________________667
       HEADS ____________________________________2
       DISCS ____________________________________1
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL
       TRANSFER RATE (mbits/sec) ________________7.5
       INTERFACE ________________________________ST412
       TPI (TRACKS PER INCH) ____________________588
       BPI (BITS PER INCH) ______________________18,897
       AVERAGE ACCESS (ms) ______________________70
       SINGLE TRACK SEEK (ms) ___________________20
       MTBF (power-on hours) ____________________100,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.4
                           +12V TYPICAL (amps) __0.9
                           +5V TYPICAL (amps) ___0.8
                           TYPICAL (watts) ______14.8
                           MAXIMUM (watts) ______33
       BUFFERED STEP PULSE RATE (micro sec) _____5-200
       WRITE PRECOMP (cyl) ______________________N/A (668)
       REDUCED WRITE CURRENT (cyl) ______________N/A (668)
       LANDING ZONE (cyl)________________________670
       IBM AT DRIVE TYPE ________________________N/A*

       *MUST BE USED WITH THE ST11R CONTROLLER

Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)